31.5-inch · 3840 × 2160 · 165 Hz · MSI global specification
A 31.5-inch 3840 × 2160 QD-OLED monitor running up to 165 Hz on every input, with a 0.03 ms GtG response rating, DisplayHDR True Black 400 and USB-C display input with 15 W charging.
Specifications checked 21 Sept 2026.
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Manufacturer specifications31.5-inch · 3840 × 2160 · 240 Hz · MSI global specification
A 31.5-inch 3840 × 2160 QD-OLED monitor running up to 240 Hz on every input, with a 0.03 ms GtG response rating, DisplayHDR True Black 400 and USB-C display input with 15 W charging.
Specifications checked 21 Sept 2026.
Amazon links open search results. Check the exact variant, current price and availability with the retailer.
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Differences first. Select a topic for its graphic, sources and conditions.
Maximum manufacturer-listed refresh rate, not measured motion clarity. The port-specific limits below matter; HDMI and DisplayPort can support different modes.
Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.
Manufacturer specification · DisplayPort: up to 240 Hz; HDMI: up to 240 Hz; USB-C DisplayPort Alt Mode: up to 240 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.
Match the monitor to the connection. Refresh limits depend on the input, cable and source device. Confirm the exact regional ports, stand adjustment and mount. Manufacturer response-time methods such as MPRT and GtG are different; neither the image nor these figures establish an independent motion or colour-quality test.
7 verified differences, most decision-relevant first. All are also drawn in Visual facts above. Missing information stays separate.
Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.
MSI MAG 321UP QD-OLED — exact model specificationsManufacturer specification · DisplayPort: up to 240 Hz; HDMI: up to 240 Hz; USB-C DisplayPort Alt Mode: up to 240 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal.
MSI MAG 321UPX QD-OLED — exact model specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Requires a compatible source, port, driver and mode.
MSI MAG 321UP QD-OLED — exact model specificationsManufacturer specification · Requires a compatible source, port, driver and mode.
MSI MAG 321UPX QD-OLED — exact model specificationsCheck the exact configuration and source conditions for your use.
MSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact swivel range isn't confirmed. · Manufacturer specification
MSI MAG 321UP QD-OLED — exact model specificationsMSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact swivel range isn't confirmed. · Manufacturer specification
MSI MAG 321UPX QD-OLED — exact model specificationsCompare the supplied stand and mounting requirements. These affect positioning and desk fit; they do not establish panel quality. Check any separately stated limits or conflicting dimensions.
A size or weight trade-off; it does not establish the better product.
Manufacturer specification · Adjustment travel, separate from assembled monitor height.
MSI MAG 321UP QD-OLED — exact model specificationsManufacturer specification · Adjustment travel, separate from assembled monitor height.
MSI MAG 321UPX QD-OLED — exact model specificationsCompare the supplied stand and mounting requirements. These affect positioning and desk fit; they do not establish panel quality. Check any separately stated limits or conflicting dimensions.
Manufacturer specification · Activated range per the datasheet. The separate Signal Frequency row lists 48~360 Hz vertical, which is not a documented 4K refresh or VRR range.
MSI MAG 321UPX QD-OLED — exact model specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance.
MSI MAG 321UP QD-OLED — exact model specificationsManufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance.
MSI MAG 321UPX QD-OLED — exact model specificationsA size or weight trade-off; it does not establish the better product.
42 shared fields have the same recorded value.
| Specification | MSI MAG 321UP QD-OLED | MSI MAG 321UPX QD-OLED |
|---|---|---|
Screen diagonal SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Manufacturer panel diagonal; rounded size printed on marketing imagery may differ. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Manufacturer panel diagonal; rounded size printed on marketing imagery may differ. MSI MAG 321UPX QD-OLED — exact model specifications | 31.5 in | 31.5 in |
Native resolution Sources | 3840 × 2160 | 3840 × 2160 |
Panel technology Sources | QD-OLED | QD-OLED |
Aspect ratio Sources | 16:9 | 16:9 |
Declared brightness SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Typical SDR brightness; not an HDR peak figure. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Typical SDR brightness; not an HDR peak figure. MSI MAG 321UPX QD-OLED — exact model specifications | 250 cd/m² | 250 cd/m² |
Static contrast claim Sources | 1500000:1 | 1500000:1 |
Colour depth Sources | 10-bit | 10-bit |
HDR support Sources | DisplayHDR True Black 400 | DisplayHDR True Black 400 |
Screen shape Sources | Flat | Flat |
Screen surface Sources | Anti-reflection | Anti-reflection |
Active display area Sources | 699.48 × 394.73 mm (horizontal × vertical) | 699.48 × 394.73 mm (horizontal × vertical) |
Pixel pitch Sources | 0.1814 × 0.1814 mm | 0.1814 × 0.1814 mm |
Declared viewing angles Sources | 178° horizontal / 178° vertical | 178° horizontal / 178° vertical |
Declared sRGB gamut SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Figures above 100% describe colour volume, not coverage. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Figures above 100% describe colour volume, not coverage. MSI MAG 321UPX QD-OLED — exact model specifications | 138.2% (CIE 1976) | 138.2% (CIE 1976) |
Declared DCI-P3 gamut Sources | 99% (CIE 1976) | 99% (CIE 1976) |
Declared Adobe RGB gamut SourcesMSI MAG 321UP QD-OLED Manufacturer specification · The datasheet note states the CIE1976 basis only for sRGB and DCI-P3; the Adobe RGB reference is not stated. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · The datasheet note states the CIE1976 basis only for sRGB and DCI-P3; the Adobe RGB reference is not stated. MSI MAG 321UPX QD-OLED — exact model specifications | 97.5% | 97.5% |
Displayable colours Sources | 1.07 billion | 1.07 billion |
Refresh rateDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · DisplayPort: up to 240 Hz; HDMI: up to 240 Hz; USB-C DisplayPort Alt Mode: up to 240 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal. MSI MAG 321UPX QD-OLED — exact model specifications | 165 Hz | 240 Hz |
Adaptive sync SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Check that your graphics card or console, input and mode support the listed technology. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Check that your graphics card or console, input and mode support the listed technology. MSI MAG 321UPX QD-OLED — exact model specifications | Yes | Yes |
Listed sync technologyDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Requires a compatible source, port, driver and mode. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Requires a compatible source, port, driver and mode. MSI MAG 321UPX QD-OLED — exact model specifications | AMD FreeSync Premium Pro | Adaptive-Sync |
Response method and claim SourcesMSI MAG 321UP QD-OLED Manufacturer specification · GtG, MPRT and input lag measure different things. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · GtG, MPRT and input lag measure different things. MSI MAG 321UPX QD-OLED — exact model specifications | 0.03 ms GtG | 0.03 ms GtG |
Declared adaptive-sync rangeDifferent SourcesMSI MAG 321UPX QD-OLED Manufacturer specification · Activated range per the datasheet. The separate Signal Frequency row lists 48~360 Hz vertical, which is not a documented 4K refresh or VRR range. MSI MAG 321UPX QD-OLED — exact model specifications | 48–165 Hz | 48–240 Hz |
Native-resolution input limitsDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Compatible source, cable and mode support required. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Compatible source, cable and mode support required. MSI MAG 321UPX QD-OLED — exact model specifications | HDMI, DisplayPort and USB-C: 3840 × 2160 up to 165 Hz | HDMI, DisplayPort and USB-C: 3840 × 2160 up to 240 Hz |
Maximum HDMI refresh at native resolutionDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Compatible source and cable required. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Compatible source and cable required. MSI MAG 321UPX QD-OLED — exact model specifications | 165 Hz | 240 Hz |
Maximum USB-C refresh at native resolutionDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · USB-C DisplayPort Alt Mode; compatible source and cable required. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · USB-C DisplayPort Alt Mode; compatible source and cable required. MSI MAG 321UPX QD-OLED — exact model specifications | 165 Hz | 240 Hz |
Declared GtG response SourcesMSI MAG 321UP QD-OLED Manufacturer specification · The feature text describes this as 'up to 0.03 ms GtG', a best-case manufacturer figure, not an average or input lag. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · The feature text describes this as 'up to 0.03 ms GtG', a best-case manufacturer figure, not an average or input lag. MSI MAG 321UPX QD-OLED — exact model specifications | 0.03 ms | 0.03 ms |
Inputs and versions SourcesMSI MAG 321UP QD-OLED Manufacturer specification · DisplayPort: up to 165 Hz; HDMI: up to 165 Hz; USB-C DisplayPort Alt Mode: up to 165 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · DisplayPort: up to 240 Hz; HDMI: up to 240 Hz; USB-C DisplayPort Alt Mode: up to 240 Hz, at native 3840 × 2160 resolution. Source, cable and selected mode must support the signal. MSI MAG 321UPX QD-OLED — exact model specifications | 1 × DisplayPort 1.4a; 2 × HDMI 2.1; 1 × USB-C with DisplayPort Alt Mode and up to 15 W Power Delivery; headphone output | 1 × DisplayPort 1.4a; 2 × HDMI 2.1; 1 × USB-C with DisplayPort Alt Mode and up to 15 W Power Delivery; headphone output |
USB-C charging SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Maximum charging output, not the monitor’s power consumption. Compatible device and cable required. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Maximum charging output, not the monitor’s power consumption. Compatible device and cable required. MSI MAG 321UPX QD-OLED — exact model specifications | 15 W | 15 W |
Picture-in-picture / picture-by-picture SourcesMSI MAG 321UP QD-OLED Manufacturer specification · MSI lists PIP / PBP as N/A. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · MSI lists PIP / PBP as N/A. MSI MAG 321UPX QD-OLED — exact model specifications | No | No |
HDMI version Sources | 2.1 | 2.1 |
DisplayPort version Sources | 1.4a | 1.4a |
USB-C connection SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Listed as a USB 2.0 Type-C port with DisplayPort Alt Mode and 15 W PD. MSI MAG 321UP QD-OLED — exact model specifications | Yes | Yes |
USB-C display input SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Source port and cable must support DisplayPort Alt Mode. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Source port and cable must support DisplayPort Alt Mode. MSI MAG 321UPX QD-OLED — exact model specifications | Yes | Yes |
USB hub SourcesMSI MAG 321UP QD-OLED Manufacturer specification · No USB Type-A or Type-B ports appear in the datasheet's port rows or its numbered connections list; the USB-C port is listed for DisplayPort Alt Mode and 15 W charging. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · No USB Type-A or Type-B ports appear in the datasheet's port rows or its numbered connections list; the USB-C port is listed for DisplayPort Alt Mode and 15 W charging. MSI MAG 321UPX QD-OLED — exact model specifications | No | No |
Headphone output Sources | Yes | Yes |
Dimensions with standDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance. MSI MAG 321UPX QD-OLED — exact model specifications | 717 × 457 × 242 mm (width × height × depth, with stand) | 717 × 477 × 242 mm (width × height × depth, with stand) |
Stand depth SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Manufacturer dimensions with stand, shown width × height × depth. Stand depth is not panel thickness and excludes additional cable clearance. MSI MAG 321UPX QD-OLED — exact model specifications | 242 mm | 242 mm |
VESA mounting pattern Sources | 100 × 100 mm | 100 × 100 mm |
Height-adjustable stand SourcesMSI MAG 321UP QD-OLED Manufacturer specification · The supplied stand has a published height adjustment range of 0–110 mm. This is travel, not the assembled monitor height. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · The supplied stand has a published height adjustment range of 0–100 mm. This is travel, not the assembled monitor height. MSI MAG 321UPX QD-OLED — exact model specifications | Yes | Yes |
Stand height travelDifferent SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Adjustment travel, separate from assembled monitor height. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Adjustment travel, separate from assembled monitor height. MSI MAG 321UPX QD-OLED — exact model specifications | 110 mm | 100 mm |
Dimensions without stand Sources | 717 × 419 × 72 mm (width × height × depth) | 717 × 419 × 72 mm (width × height × depth) |
Stand adjustmentDifferent SourcesMSI MAG 321UP QD-OLED MSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact swivel range isn't confirmed. · Manufacturer specification MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED MSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact swivel range isn't confirmed. · Manufacturer specification MSI MAG 321UPX QD-OLED — exact model specifications | Tilt −5° to +15°; height travel 110 mm; swivel supported; screen rotation ±10° (MSI's 'pivot' figure — not a 90° portrait pivot) | Tilt −5° to +15°; height travel 100 mm; swivel supported; screen rotation ±10° (MSI's 'pivot' figure — not a 90° portrait pivot) |
Stand tilt Sources | −5° to 15° | −5° to 15° |
Swivel-adjustable stand SourcesMSI MAG 321UP QD-OLED Manufacturer specification · MSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact range isn't confirmed. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · MSI's datasheet prints the swivel range as “30° ~ 30°” (no minus sign), so the exact range isn't confirmed. MSI MAG 321UPX QD-OLED — exact model specifications | Yes | Yes |
Portrait pivot SourcesMSI MAG 321UP QD-OLED Manufacturer specification · The stand lists a −10° to 10° rotation adjustment, not a 90° portrait pivot. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · The stand lists a −10° to 10° rotation adjustment, not a 90° portrait pivot. MSI MAG 321UPX QD-OLED — exact model specifications | No | No |
Net weight SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Manufacturer net weight; the datasheet does not state whether the stand is included. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Manufacturer net weight; the datasheet does not state whether the stand is included. MSI MAG 321UPX QD-OLED — exact model specifications | 9.1 kg | 9.1 kg |
Gross shipping weightDifferent Sources | 11.8 kg | 11.4 kg |
Kensington lock slot Sources | Yes | Yes |
AC input SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Power type is listed only as 'Power Cable'; the connections list an AC input. Supply-input range, not operating power consumption. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Power type is listed only as 'Power Cable'; the connections list an AC input. Supply-input range, not operating power consumption. MSI MAG 321UPX QD-OLED — exact model specifications | 100–240 V, 50/60 Hz | 100–240 V, 50/60 Hz |
OLED maintenance features SourcesMSI MAG 321UP QD-OLED Manufacturer specification · MSI does not itemise the individual care functions. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · MSI does not itemise the individual care functions. MSI MAG 321UPX QD-OLED — exact model specifications | OLED Care 2.0 | OLED Care 2.0 |
Panel cooling Sources | Fanless (graphene film with custom heatsink) | Fanless (graphene film with custom heatsink) |
Manufacturer warranty SourcesMSI MAG 321UP QD-OLED Manufacturer specification · Regional terms and exclusions apply. MSI MAG 321UP QD-OLED — exact model specificationsMSI MAG 321UPX QD-OLED Manufacturer specification · Regional terms and exclusions apply. MSI MAG 321UPX QD-OLED — exact model specifications | 3 years, including panel burn-in | 3 years, including panel burn-in |
Closest monitors to this pair by shared key specifications. Not a popularity ranking.
Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.
